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miles away). Data for the Ripon station were available for 2017 and 2018; based on the <br /> calculation shown, the estimated rate of recharge from percolating waters for the Ripon <br /> station is determined to be 3.12 inches (Plate 11). Data for the Holt station were <br /> available for 2017 and 2018; based on the calculation shown, the estimated rate of <br /> recharge from percolating waters for the Holt station is determined to be 3.72 inches <br /> (Plate 12). <br /> Recharge Scenario 2— WRCC Tracy Pumping Plant and CIMIS Holt Stations <br /> For the combined CIMIS and WRCC stations scenario (Plate 13), the closest WRCC <br /> station is the Tracy Pumping Plant (Station 049001), located approximately six miles <br /> from the Site. This station is approximately nine miles closer to the Site than the CIMIS <br /> station, and as a result is anticipated to have more accurate regional rainfall data. <br /> WRCC does not track evapotranspiration; consequently, rainfall data from the Tracy <br /> Pumping Plant and evapotranspiration data from the Holt station (the closest CIMIS <br /> station to the Tracy Pumping Plant) were utilized. Based on the calculation shown, the <br /> estimated rate of recharge from percolating waters for vicinity of the Site is determined <br /> to be 6.17 inches. <br /> Live'Oak- has selected this scenario for use in the nitrate loading calculation based on <br /> the proximity of the Tracy Pumping Plant Station to the project Site. <br /> Quality of Rainwater <br /> Hantzsche and Finnemore utilize 1 mg/L-N as the nitrate concentration of rainwater; in <br /> the past, Live Oak has utilized this value for the nitrate loading calculation. <br /> In May 2019, Live Oak collected rainwater during two storm events in Lodi; the samples <br /> were analyzed for nitrate by FGL Environmental of Stockton. Each sample was <br /> collected in a clean, dry, stainless steel bowl, then decanted into a plastic container and <br /> placed on ice for transport. <br /> Nitrate was detected in the May 17 sample at a concentration of 0.4 mg/L-N and in the <br /> May 19 sample at a concentration of 0.2 mg/L-N. The laboratory analytical results are <br /> attached as Appendix 5 of this report. Live Oak then averaged the concentrations of the <br /> two samples, for a value of 0.3 mg/L-N to represent the nitrate concentration of rain. <br /> Because the San Joaquin County Environmental Health Department has requested that <br /> local and recent data be utilized wherever possible, the concentration of the Lodi <br /> rainwater been selected for the nitrate loading calculation. <br /> LOGE 1849 Page 10 <br />